Threshing-machine.



D. A. MOGONNBLL.

THRESHING MACHINE. APPLIUATION FILED JAN. 22, 1913,

1,099,070, Patented June 2, 1914.

2 SHEETS-SHEET 1.

D. A. MOGONNELL. THRBSHING MACHINE. APPLICATION FILED JAN. 22, 1913.

Patented June 2, 19M

2 SHEETS-SHEET 2 UNITED STATES PATENT OFFICE.

DAVID A. MGGONNELL, OF KEARNEY, NEBRASKA.

THRESHINGr-MACHINE.

To all whom it may concern:

Be it known that I, DAVID A. MoCoNNELL, a citizen of the United States,residing at Kearney, in the county of Bufialo and State of Nebraska,have invented new and useful Improvements in Threshing-Machines, ofwhich the following is a specification.

This invention relates to threshing inachines, and it has for its objectto provide a simple and improved construction whereby the interior ofthe threshing mechanism and particularly the concave is renderedconveniently accessible for repairs without necessity for first removingthe cylinder.

A further object of the invention is to simplify and improve theconstruction of the concave with a view of rendering the toothed barsthereof conveniently detachable and replaceable in order that any injurysuch as the breaking of a tooth may be quickly and convenientlyrepaired.

With these and other ends in view which will readily appear as thenature of the in vention is better understood, the same consists in theimproved construction and novel arrangement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claims.

In the accompanying drawings has been illustrated a simple and preferredform of the invention, it being, however, understood that no limitationis necessarily made to the precise structural details therein exhibited,but that changes, alterations and modifications within the scope of theclaims may be resorted to when desired.

In the drawings,Figure 1 is a top plan view, showing the front portionof a threshing machine equipped with the improvement, the cylinderhaving been removed. Fig. 2 is a longitudinal sectional view of thesame, the cylinder having been shown in position and the concave beinglikewise in position for operation. Fig. 3 is a longitudinal sectionalview showing the cylinder in position and showing the front doorremoved, and showing also the concave dropped and one of the toothedbars in the act of being detached. Fig. 41 is a transverse Specificationof Letters Patent.

Application filed January 22, 1913.

Patented June 2, 1914.

Serial N 0. 743,634.

sectional view taken on the line 4 4- in Fig. 2. Fig. 5 is a sideelevation. Fig. 6 is a perspective view of the concave frame detached.

' Corresponding parts in the several figures are denoted by likecharacters of reference.

The throat of the threshing machine casing includes the side members 1,1 which are extended forwardly of the main casing, a portion of whichappears at 2, said side members being rounded on their undersides, asindicated, so that the front portion of the throat will present theleast possible obstruction to a person working beneath the same whenperforming needed repairs. This is iniconformity with the constructionillustrated in Patent No. 1,038,926, granted to me on September 17,1912. The cylinder 3 is supported for rotation on the side membore 1,the customary cover for said cylinder being provided, as shown at 1.

5 is a feed board.

The concave frame is composed of side members 6 of arouate shape, saidside members being provided in their inner opposed faces with grooves 7extending to the front ends of the side members where said grooves areopen for the admission of the bars 8 having the teeth 9, which latterare of con ventional shape and are preferably detachably connected withthe bars by means of nuts 10 engaging the threaded shanks 11 of theteeth. The concave frame is pivotally supported on a rod 12 that extendstransversely through the throat, said rod being provided with a wing nut13 which may be tightened against the proximate side member of thethroat. The side members 6 of the concave frame are provided on theirundersides with cam-shaped projections 14.

A rock shaft 15, which extends transversely through the throat of themachine, is supported for oscillation by the side members 1 beneath theconcave frame, and said shaft is provided with a crank or offset 16extending the entire distance between the side members 1. Said crank oroifset portion is adapted to engage and support the side members of theconcave frame, being in engagement with the shoulders 17 at the lowerends of the cams 14;, as seen in Fig. 2. it is obvious that by rockingthe shaft 15 to withdraw the crank from such engagement the concaveframe will drop by gravity to the position indicated in Fig. 3. The rockshaft 15 has at one end a hand lever 18, whereby it may be manipulated,said lever being provided with a head 19 having a tooth or ratchet 2Oadaptedto be engaged by a pawl or dog 21, whereby it will be heldsecurely in position to prevent accidental disengagement of the crank oroffset portion 16 from the shoulders 19.

The side members 1 of the throat are connected together beneath the feedboard 5 by a rod 22 having a wing nut 23. By tightening said wing nut,as well as the nut 13 on the rod 12, the side members 1 will be drawntogether so as to clamp between them the concave casing, therebymaterially assisting in supporting the latter in position for operationwhen, as is well known, it is subjected more or less to a strain of aheavy nature. Much of the strain on the crank 16 and rock shaft 15 maythus be re lieved.

A removable door or closure 1) for the front end of the throat of themachine is provided, said closure being in the nature of a curved platehaving straight upper and lower edges and arcuate side edges, and saidplate being provided on its concave face near the upper edge thereofwith hooks 24, whereby it may be detachably supported on the rod 22, thelower end of said plate being loosely supported on the cross bar 25 atthe front end of the main portion of the machine casing. This removabledoor or closure is described and claimed in the Letters Patent issued tome, as hereinbefore mentioned.

From the foregoing description, taken in connection with the drawingshereto annexed, the operation and advantages of this invention will bereadily understood.

The grain is fed over the feed board between the cylinder and theconcave, and a considerable portion of the threshed grain will pass bet'een the toothed bars of the concave on to the curved closure member Dover which it is discharged on to the customary conveyor. Access to thespace between the concave and the cylinder for the purpose of repairingthe concave or removing material that may have become blocked or lodgedbetween the cylinder and concave, or for other reasons, may be readilyhad by removing the closure D and actuating the rock shaft 15 todisengage the crank 16 from the shoulders of the cams 14, when theconcave will drop by gravity to the position shown in Fig. 3. l Vhen theconcave is in this position, the toothed bars 8 may be readily slid outat the front end for the purpose of replacing teeth that may have beenbroken. To restore the concave to its initial position, the rock shaftis rotated to cause the crank 16 to exert a lifting action on theundersides of the cams 14: until the crank slips beneath the shoulders17 at the lower ends of said cams, after which the pawl 21 may be placedin engagement with the ratchet 20, thereby locking the rock shaftagainst displacement. By tightening the wing nuts on the rods 12 and 22the concave will be retained with additional security, as will bereadily understood.

Having thus described the invention, what is claimed as new, is:-

1. A threshing machine casing including a throat having side members, aconcave including curved side members pivoted on the rod and havinggrooves in their opposed faces, said grooves being open at their frontends, and tooth carrying bars slidably engaging the grooves, a rockshaft supported on the side members of the throat and having a crankextending between said side members, and cams on the undersides of theside members of the concave engaged by said crank, and means foractuating the rock shaft to throw the crank out of the path of the camsto permit the concave to swing to a position where the tooth carryingbars may be removed.

2. A threshing machine casing including a throat having side members, aconcave, a rod on which said concave is pivotally supported at the rearend thereof, a rod connecting the side members of the casing in advanceof the concave, and tightening nuts on said rods whereby the sidemembers of the casing may be clamped on the concave to hold the latterfrictionally against displacement.

3. A threshing machine casing including a throat having side members, aconcave, a rod on which said concave is pivotally supported at the rearend thereof, a rod connecting the side members of the casing in advanceof the concave, and tightening nuts on said rods whereby the sidemembers of the casing may be clamped on the concave to hold the latterfrictionally against oisplacement, in combination with means forpositively supporting the concave in position for operation including arock shaft having a crank, cams on the concave engaged by said crank,and means for actuating the rock shaft to move the crank out of the pathof the concave.

4:. A threshing machine casing including a throat having a side and adetachable front closure member, a concave including grooved sidemembers and tooth carrying bars slidably and detachably engaging saidside members, a rod on which the concave is tooth carrying bars tomaintain the parts in pivotaily supported, a supporting rod for positionfrictionally. 10 the detachable front closure member, said In testimonywhereof I aflix my signature rods having threaded ends extending throughin presence of two witnesses.

5 the side members of the casing, and nuts on DAVID A. MOCONNELL.

the threaded rods for compressing the side Witnesses: members of thecasing upon the side mem- W. L. HAND, bers of the concave and the latterupon the JAMES JENKINS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

